gunny vs hessian

gunny

noun
  • A coarse heavy fabric made of jute or hemp. 

  • A gunny sack. 

  • A gunnery sergeant. 

hessian

noun
  • A strong, coarse fabric made from hemp or jute, often used for making sacks. 

How often have the words gunny and hessian occurred in a corpus of books? (source: Google Ngram Viewer )